Data on the emission of endotoxins from livestock farms are needed as input for a possible endotoxinassessment framework for the protection of the health of people living in the vicinity of farms. In addition,emission figures are needed in a current research project in which concentration gradient maps aregenerated and relationships between modelled endotoxin concentrations and residents' medical data areexamined. In two previous reports, a literature study was conducted (WLR Report 773) and a first set ofemission figures was obtained which were used in indicative dispersion calculations at a number of fictitiousfarm sites (WLR Report 959). This third part of the research focused on a further substantiation and detailingof the emission figures and the dispersion modelling of endotoxins. In this report, the first set of emissionfigures has been extended to a total of 60 measurements carried out at a total of 18 livestock houses forlaying hens, broilers, fattening pigs, sows, piglets and dairy cows. In addition, this report contains twoliterature studies that provide insights for a valid design of the dispersion modelling of endotoxins fromlivestock farms to the environment and local residents. With all this, previously lacking knowledge has beendeveloped which in future can serve as components of a possible endotoxin assessment framework and asinput for the project ‘Modelling health risks of livestock houses’.